EP 0350115 A1 19900110 - A power supply circuit in microwave.
Title (en)
A power supply circuit in microwave.
Title (de)
Stromversorgungsschaltung eines Mikrowellenherdes.
Title (fr)
Circuit d'alimentation pour un four à micro-ondes.
Publication
Application
Priority
SE 8802529 A 19880706
Abstract (en)
A power supply circuit for a high-frequency source (M) in a microwave oven comprises a switch-mode-power-supply unit, the resonant circuit of which contains a coil (L2) and a controllable switch (D1), the switching of which is controlled by a control circuit (K) through a driving stage (S). The power supply circuit is cooled by a fan (F). The required DC voltages for feeding the driving stage (S), control circuit (K) and fan (F) are obtained by means of an auxiliary winding (W1, W2) on the coil (L2) and a rectifier (D3, D4). This measure results in that both space and costs are saved. At the same time, an automatic supervision of the different functional units of the power supply circuit is obtained.
IPC 1-7
IPC 8 full level
H05B 6/66 (2006.01)
CPC (source: EP US)
H05B 6/666 (2013.01 - EP US)
Citation (search report)
- US 4383156 A 19830510 - FURUSAWA TAKASHI [JP]
- GB 2116787 A 19830928 - GOULD INC
- GB 2056195 A 19810311 - CHLORIDE GROUP LTD
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0350115 A1 19900110; EP 0350115 B1 19931229; DE 68911769 D1 19940210; DE 68911769 T2 19940519; JP 2765727 B2 19980618; JP H0286091 A 19900327; SE 461626 B 19900305; SE 8802529 D0 19880706; SE 8802529 L 19900107; US 4949233 A 19900814
DOCDB simple family (application)
EP 89201739 A 19890630; DE 68911769 T 19890630; JP 17130889 A 19890704; SE 8802529 A 19880706; US 37257389 A 19890627